Chemistry, 16.09.2019 04:20 alanrojas0142007

Need with chemistry question
1.) which is not a permissible set of quantum numbers? identify the subshell (if the quantum numbers identify a possible state).
i. n = 2, ℓ = 0, mℓ = 0
ii. n = 3, ℓ = 2, mℓ = 2
iii. n = 2, ℓ = 1, mℓ = –1
iv. n = 3, ℓ = 3, mℓ = 0
v. n = 4, ℓ = 3, mℓ = –3
2.)what is the difference between the 2pz and the 3pz orbitals? which quantum numbers in the orbital designation are different? which will be the same? what does this indicate about the orbitals?
3.)what is the maximum number of electrons that can have n = 3 and ms = + ½ ?

Answers: 1

Show answers

Answers

Answer from: wisal96

This is a multiple question and here are all the answers.

Qestion 1.) Which is not a permissible set of quantum numbers? Identify the subshell (if the quantum numbers identify a possible state).

I. n = 2, ℓ = 0, mℓ = 0

II. n = 3, ℓ = 2, mℓ = 2

III. n = 2, ℓ = 1, mℓ = –1

IV. n = 3, ℓ = 3, mℓ = 0

V. n = 4, ℓ = 3, mℓ = –3

The combination that is not permissible is IV. n = 3, ℓ = 3, mℓ = 0.Se below to identify the subshells.

Explanation:

The electrons are identified by a set of four quantum numbers.

The first quantum number, n, is the principal quantum number and it tells the shell. The second quantum number,ℓ , is the azymuthal quantum number and it tells the subshell.

The letters used to indicate the subshells are:

s: ℓ = 0

p: ℓ = 1

d: ℓ = 2

f: ℓ = 3

The third and fourth quantum numbers are mℓ (magnetic quantum number) and s (spin).

The rules that apply to predict which quantum numbers are possible are:

n: 1, 2, 3, 4, 5, 6, 7 (an integer greater than 0)ℓ: 0, 1, 2, 3, ..., n-1 (an integer less than n)mℓ: an integer from - ℓ to + ℓ s: - 1/2 or +1/2

Two electrons in an atom cannot have the same set of 4 quantum numbers.

With that:

I. n = 2, ℓ = 0, mℓ = 0

This combination of three quantum numbers is permissible, since n is a positive integer, ℓ is less than n, and mℓ is in the interval +ℓ to - ℓ. The combination n = 2 and ℓ = 0 means the subshell is 2p.

II. n = 3, ℓ = 2, mℓ = 2

This combination of three quantum numbers is permissible, since n is a positive integer, ℓ is less than n, and mℓ is in the interval +ℓ to - ℓ. The combination n = 3 and ℓ = 2 means the subshell is 3d.

III. n = 2, ℓ = 1, mℓ = –1

This combination of three quantum numbers is permissible, since n is a positive integer, ℓ is less than n, and mℓ is in the interval +ℓ to - ℓ. The combination n = 2 and ℓ = 1 means the subshell is 2p.

IV. n = 3, ℓ = 3, mℓ = 0

This set of three quantum numbers is not permissible, since ℓ = 3 is not less than n = 3.

V. n = 4, ℓ = 3, mℓ = –3

This set of three quantum numbers is permissible, since n is a positive integer, ℓ is less than n, and mℓ is in the interval +ℓ to - ℓ. The combination n = 4 and ℓ = 3 means the subshell is 4f.

Question 2.)What is the difference between the 2pz and the 3pz orbitals? Which quantum numbers in the orbital designation are different? Which will be the same? What does this indicate about the orbitals?

The difference between 2p_z and 3p_z (note that the letter z is a subscript) is in the first quantum number.

The first quantum number indicates the main energy level and so it is related with the size of the orbital.

So, the 3pz orbital is bigger than the 2pz orbital.

The second quantum number is related to the letter p, so the same letter indicates the same shape of the orbital. Remember the table for the letters used to indicate the subshells are:

s: ℓ = 0

p: ℓ = 1

d: ℓ = 2

f: ℓ = 3

So, the scond quantum number for the two orbitals is ℓ = 1.

The subscript indicates the space orientation. So, since both orbitals have the same subscript, z, they have the same orientation.

In conclusion, the only difference between those orbitals is the size of the orbitals, but they have the same shape and orientation.

3.)What is the maximum number of electrons that can have n = 3 and ms = + ½ ?

9 electrons

Explanation:

Using the rules, for n = 3

ℓ can be 0, 1, or 2; mℓ can be 0 for ℓ = 0, mℓ can be -1, 0, or -1 for for ℓ = 1, and mℓ can be -2, -1, 0, +1, or +2 for ℓ = 2,

You can get the possible sets of quantum numbers (with n = 3):

(3, 0, 0, +1/2)(3, 0, 0, -1/2)(3, 1, 0, +1/2)(3, 1, 0, -1/2)(3, 1, 1, +1/2)(3, 1, 1, -1/2)(3, 1, -1, +1/2)(3, 1, -1, -1/2)(3, 2, 0, +1/2)(3, 2, 0, -1/2)(3, 2, -2, +1/2)(3, 2, -2, -1/2)(3, 2, -1, +1/2)(3, 2, -1, -1/2)(3, 2, 1, +1/2)(3, 2, 1, -1/2)(3, 2, 2, +1/2)(3, 2, 2, -1/2)

So, those are a total of 18 electrons from which half have n = 3 and ms = +1/2.

Hence, 9 electrons can have n = 3 and ms = +1/2.

Answer from: Quest

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.

Answer from: Quest

The answer is probably c. xylem

Another question on Chemistry

Chemistry, 22.06.2019 04:40

Listen base your answer to the question on the information below.propane is a fuel that is sold in rigid, pressurized cylinders. most of the propane in a cylinder is liquid, with gas in the space above the liquid level. when propane is released from the cylinder, the propane leaves the cylinder as a gas. propane gas is used as a fuel by mixing it with oxygen in the air and igniting the mixture, as represented by the balanced equation below.c3h8(g) + 5o2(g) → 3co2(g) + 4h2o() + 2219.2 kja small amount of methanethiol, which has a distinct odor, is added to the propane to consumers detect a propane leak. in methanethiol, the odor is caused by the thiol functional group (–sh). methanethiol, ch3sh, has a structure that is very similar to the structure of methanol.what is the correct structural formula for a molecule of methanethiol

Answers: 3

Answer

Chemistry, 22.06.2019 11:00

Which statement correctly identifies the scientific question and describes why the question is scientific? question 1 refers to the supernatural.question 2 reflects a moral or social value.question 3 refers to something that can be measured.question 4 reflects a question that can’t be observed.

Answers: 1

Answer

Chemistry, 22.06.2019 18:30

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the independent variable in galileo's experiment? a. the speed of the ball b. the slope of the plane c. whether the ball moved d. what the ball was made of

Answers: 2

Answer

Chemistry, 22.06.2019 20:50

One nanometer is equal to how many meters?

Answers: 2

Answer

You know the right answer?

Need with chemistry question
1.) which is not a permissible set of quantum numbers? identify...

Questions